Oil circuit breaker



Dec. 1, 1931. H. J. LINGAL OIL CIRCUIT BREAKER Filed June 18, 1927 2 Sheets-Sheet l INVENTOR Harr J. Lingol.

{in 1}. Bl// 6 I G O 0 V i m 5 a .Tm 3 R 5 25H, J 3 3 W, W I

ATTdRNEY Dec. 1, 1931. H. J. LINGAL OIL CIRCUIT BREAKER Filed June 18, 1927 2 Sheets-Sheet 2 Fig.4.

WITNESSES:

m g Fm mL m WW IF I O. H

ATTQRNEY Patented Dec. 1 1931 UNITED ,VTISTIATES PAT NToFFIC HARRY J. LINGAL, or :errrsnumn. IPENNSYLVANIA,-A.SSIGNOR TO WESTINGHOUSE ELECTRIC & murnorunmeoomrm, A CORPORATION or PENNSYLVANIA 01L crncuxrimnmn Application: filed June 18,

My invention relates to enclosing casings for electrical apparatus and more particularly to methods for forming watertight'joints between such casings and the sheaths of cables carrying current to the apparatus therein.

One object of my invention is to provide an inlet end-bell adapted to form a Watertight a plurality of electrical conductors. 1

Another object of my inventionis to rovide an inlet structure for a housing that s all be adaptedto interchangeably receive watertight end-bells for either a plurality of single cables or for a single cable containing a plurality of conductors when the latter is employed. in place of the pluralityof single cables.

A further object of my invention is to provide a. housing for electrical apparatus that i 3 shall havea plurality of openings for watertight connection to aplurality ofcables, but

' soarrangedthatby the substitution of a single adapter any desired side of the 0011 tainer may be readily adapted for the'connection of a sin le cable havin a luralit of conductors, instead of aplurality of single conductor cables, without any other changes being made in the container. I A still further object of my invention is to providea housing with an inlet structure of the foregoing type in Which the same boltholes may be used for attaching either the end-bells of a plurality of single cables or the end-bell of a single multi-conductor cable. It has been the practice, in constructing watertight housings, to provide one type of casing for connecting a plurality of single cables to the housing by means of watertight end-bells individual toeach and to provide a different type of casing, when a single multi-conductor cable is employed in the place of a plurality of singleeconductor cables. This obviously results in a waste of time and money whenever it is desired to change from a multi-conductor supply-cable to aplurality of single cables, or vice versa. 7

To avoid this expense and to make an interch angeable connector, I have invented the endbell disclosed I herein. My invention While-applicable to electrical apparatus genioint with the sheath of a. cable comprising 1927. SerialKo. 199,680.

erally, is here illustrated as applied to a circuit interrupter. My invention will best i be understood by referring to the drawings, inwhich g I P w Figure l is a plan view of a circuit interrupter embodying my invention, a part of the cover being removed;

Fig. 2 is an elevational view,partly insection, of 'the circuit interrupter shown in 1'; a a Fig. 3'is, a view in section showing theendbell'used for connecting a multi-conductor cable'to a housing in accordance with my invention and Fig. 4 is a similar view showing the connecti'onof a plurality of cables to thehousinfg. My invention is here applied to acircuit interrupter 1 having a housing 2 comprising acover 3 and tank 4, the wholejform-ing a watertight container that may beeniployed on cross. arms} of telephone poles and in other locations where the apparatus would be subjected to rain' and moisture. y The housing 3 supports the terminal 5 and the operatingmechanism 6 in amanner too well-known in the art to require separate description, inasmuch as'it constitutes no part of the present invention. The wall of the housingQ contains apertures 12 through which the eonductingcables 13 enter to make electrical connection with the terminal 5. The cable 13, as shown in Figs. 3 and 4;, have watertight lead sheaths between which'and the housing '2 it is desired to form a; watertight joint. I

In a three-pole circuit interrupter, as shown in Figs. land 2 of the drawings, a

. plurality of leads 13 are required for the operation of: the circuit interrupter. Insonie V installations, these leads are encasedeach in i-ts own cable sheath, as shown in Fig. i. "In others, apl-urality of conductors 13 are combined in a single sheath 21, as shown in Figf 3. It has been the practicein the past to pronected to the circuit-interrupterjn Fig. 3. I

vide different casings 2 to correspond to these 9 Where a plurality of single-conductor cables are installed, they are provided with individual end-bells 16, making watertight joints 17 with their respective cable-sheaths in any well-known way. The end-bells 16 are then secured by bolts 32 to the face of the casing 3 so as to form watertight joints therewith. This construction is illustrated in Fig. 4;.

When, however, a single multi-conductor cable is installed, its sheath 21 is united, by any watertight means, to a collar 23 forming a watertight joint 24. The collar 23 is bolted to an end-bell 22 by bolts 25 and forms a Watertight joint therewith. The face of the end-bell 22 is provided with a flange 26. The bushing is elongated to span all the apertures 12 and forms a watertight joint with the face 29 of the housing 3. Packing 31 is provided between the flange 26 of the bushing 22 and the machined face 29 of the housing 3, and the end-bell 22 is supported in position by the same bolts 32 that may be used to support the plurality of single bushings 16, as described in connection with Fig. 4.

In Figs. 1 and 2, the right side of the cir cuit interrupter is shown with a plurality of single cables 15 and watertight bushings 16 in accordance with the structure of Fig. 4. The left-hand side is provided with my bushing 22, making entrance for the single sheath 21 of a multi-conductor cable containing a plurality of cables 13. It will be readily seen that my bushing provides a flexible method of connection for the cables of the circuit whether they consist of a pluralityof single cables or the single sheath of a multi-conductor cable or a combination of both. A water tight connection for either kind of cable is provided without change of the casing 2.

In either case, the end-bells are simple to attach, since they employ the same means of support for the single multi-conductor cable as for the plurality of single cables and a desirable and flexible method of installation thus results.

It is to be understood that such changes in the form, arrangement and connection of the component parts of my invention may be made as shall fall within the scope of the appended claims.

I claim as my invention:

1. A container for electrical apparatus having a plurality of apertures each aperture provided with a facing adapted for Watertight connection with a single cable, an endbell for a single sheath multi-conductor cable having one flanged end elongated to span the plurality of apertures and adapted to form a Water-tight engagement with the facings thereof.

2. A casing for electrical apparatus, a plurality of like apertures in the casing, means for singly attaching single-conductor cables to selected apertures in watertight connection, and means for singly attaching a multiconductor cable to a corresponding number of adjacent apertures in watertight connection.

3. A container for electrical apparatus having a plurality of apertures, each of said apertures being provided with a facing and with securing means adapted for holding a single conductor end-bell in watertight engagement with said facing, and an end-bell for a single-sheath multi-conductor cable having one end elongated to span the plurality of apertures held in watertight engagement with said facings by means of said securing means.

4. In electrical apparatus, a housing having a plurality of apertures arranged in a group, each of said apertures having securing means adapted for fastening a single end-bell thereto, and an end-bell for a multi-conductor cable having one end of such size as to span said group of apertures, and being secured thereto by means engaged by said socuring means at each aperture. I 5. Inelectrical apparatus,ahousinghaving a plurality of apertures arranged in a group, securing means adjacent each of said apertures and so arranged that an end-bell may be secured to said housing at each of said apertures, and also so arranged that a niulti-conductor end-bell having an enlarged end may be secured to said housing to span said group of apertures. V l

6. In electrical apparatus, a housinghaving a plurality of apertures arranged in a group, said housing being faced and having securing means adjacent each of said apertures and so arranged that an end-bell may be secured in watertight engagement with said facing at each of said apertures, and also so arranged that a multi-conductor end-bell having an enlarged end may be secured in watertight engagement with said facing to span said group of apertures.

In testimony whereof, I have hereunto subscribed my name this 7th day of June, 1927.

HARRY J. LINGAL. 

